<Columns>
    <Column>
        <Notification Color="Color.Primary">First column</Notification>
    </Column>
    <Column>
        <Notification Color="Color.Primary">Second column</Notification>
    </Column>
    <Column>
        <Notification Color="Color.Primary">Third column</Notification>
    </Column>
    <Column>
        <Notification Color="Color.Primary">Fourth column</Notification>
    </Column>
</Columns>